Puro.earth runs the engineered-removal credit programme with CORC (CO2 Removal Certificate, 1 t net long-term removal each) issued to audited Production Facilities against published methodologies, transferable between account holders and retired for the beneficiary. General Rules v4.3 (March 5, 2026) with CORC100+/200+/1000+ durability labels; the Geologically Stored Carbon methodology (v5, April 2026) credits 1000-year storage of ≥95% streams in geological reservoirs with eligible-jurisdiction gating (US, EEA, UK, listed Canadian provinces, others by framework proof against EU/US criteria). Nasdaq-listed Puro gives the programme exchange-grade plumbing: registry, issuance, transfer, retirement. Durability-tiered labels (hundreds vs thousand years) let buyers pay for permanence horizons, not generic tonnes.
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